Kuryakyn 7186 Finned Spark Plug Covers for Harley Milwaukee-Eight Cast from quality aluminum, these easy-to-install covers feature machined outer edges to match the cylinder heads and fill the gap for a clean, finished appearance. Investment cast aluminum with wrinkle-black finish and machined outer edges Easy to install and remove for cleaning or required maintenance FITS: '17-'18 Electra Glides, Road Glides, Road Kings, Street Glides & Trikes; '18 Softail Models